KR20050056826A - Press-fitting apparatus stitcher for casing for constructing foundation pile on soft soil ground and pile construction method(augeo pile method) using the same - Google Patents

Abstract

The present invention provides a low noise and low vibration environment by a non-perforated indentation method, and a casing indentation apparatus for constructing a pile of soft ground to reduce the construction period and to be easily installed in a narrow work space, and using the same. The basic pile construction method. The guide installed in the hydraulic excavator is provided with a casing for press-fitting the hollow hollow wall retaining and pile outer wall retaining pipes so as to be able to move up and down linearly. In addition, at the lower end of the casing, a support plate for reinforcing the tip support force of the pile and preventing backflow of soil is detachably coupled with the pipe outer wall retaining pipe. At least one hydraulic motor for generating a driving force is installed in the guide to press the casing for holding the wall into the soft ground. A drum is coupled to each drive shaft of the hydraulic motor, and a drum is formed on the drum to form a closed loop, and a cable is coupled to a part of the casing for maintaining the wall. Upper and lower portions of the guide are provided with a first guide roller for supporting the cable.

Description

Press-fitting Apparatus Stitcher for Casing for Constructing Foundation Pile on Soft Soil Ground and Pile Construction Method (Augeo Pile) Method) Using the Same}

The present invention relates to a device and a construction method for the construction of the foundation pile (soft) of the soft ground, more specifically, to provide a low noise and low vibration by a non-perforated indentation method and to be easily constructed even in a narrow work space and short construction period The present invention relates to a casing press-fitting apparatus for basic pile construction of a soft ground and a basic pile construction method using the same.

In general, in order to build a variety of buildings or structures, the work to strengthen the ground must be performed first so that the buildings or structures are not damaged or collapsed due to settlement of the ground.

Therefore, many ground reinforcement methods and construction devices for this are being developed. As a typical method, excavate a soft ground by a predetermined depth by using a drill rod formed with an excavation bit, and then remove the drill rod and water spray nozzle in the excavated hole. The formed cutting rod is inserted and rotated and lifted to inject high pressure water to cut the surrounding ground, then remove the cutting nozzle, and insert the rotary stirring rod formed with the injection hole to the bottom of the excavated ground to inject the cement hardener. Thereafter, there is a method of obtaining a hardened concrete layer by injecting a cement hardener and forcing it to be stirred with cutting soil while pulling upward.

However, in the conventional boring method, a drilling rod having an excavation bit for ground drilling, a cutting rod having a water spray nozzle for ground cutting, and a stirring rod which is stirred with a cutting soil by injecting a cement hardener Each must be provided separately, and because it has to go through several work processes using them one by one, there is a problem that takes a lot of work time.

In addition, the punching method for forcibly filling the concrete pillar (pile) in the ground in addition to the perforated method is used, but there is a problem of severe noise and vibration caused by the impact and generating cracks in the surrounding buildings. In particular, cracks in the head and shaft of the concrete pile due to driving may result in reconstruction due to poor construction of the foundation pile. In addition, there is a problem that construction in a narrow workplace is difficult because a large number of large equipment equipped with several types of hammers for supporting and hitting concrete piles must be mobilized.

The present invention is to solve the problems of the prior art, an object of the present invention is to significantly reduce the vibration and noise by the non-perforated indentation, to build a foundation pile excellent in tip support, and to shorten the construction period to greatly increase the construction cost It is to provide a casing press-fitting device for the basic pile construction of the soft ground that can be saved.

Another object of the present invention is to provide a foundation pile construction method using a casing press-fitting apparatus for the foundation pile construction of the soft ground according to the present invention.

In order to solve the above object, the casing indentation apparatus according to the present invention, in the device for constructing the foundation pile in the ground, an excavator (Excavator), the guide installed on the excavator, the support plate for strengthening the tip bearing capacity of the pile Removably coupled to the lower end of the hollow hollow wall retaining casing is installed to be able to move up and down linearly to the guide, the drive means for generating a driving force to press the casing for holding the hollow wall holding in the guide into the soft ground And a power transmission means for connecting the driving means and the empty wall holding casing to transfer the driving force of the driving means to the empty wall holding casing.

The drive means may be at least one hydraulic motor, the power transmission means is at least one drum coupled to each drive shaft of the hydraulic motor, the drum is wound around the drum to form a closed loop (closed loop) It may include a cable coupled to the casing for, and a first guide roller fixed to the upper side of the guide to support the cable.

A groove for accommodating the cable may be provided on a surface of the drum, and a buffer for mitigating shock and vibration generated during the press-fitting process of the empty wall retaining casing is combined with the empty wall retaining casing at the middle of the cable. An additional can be installed.

The buffer part is a hollow body, a cover for closing the open upper and lower ends of the body, and through the cover is partially received inside the body and the other part is exposed to the outside of the body is connected to the cable It may include a pin, a release preventing plate coupled to the end of the pin located inside the body, and a spring provided between the cover and the release preventing plate.

The guide wall is attached to the casing for holding the hollow wall to form a hollow pipe for forming the outer wall of the steel or plastic material to the predetermined position without perforation press-in. At this time, the support plate is attached to the lower part. The guide may be provided with a tension control unit for adjusting the tension and may include a fixed cylinder and a piston.

Basic pile construction method according to the present invention for achieving the above another object, in the basic pile construction method of the soft ground using the device according to an embodiment of the present invention, (a) the guide and the ground on the soft ground to be constructed; Positioning the empty wall retaining casing vertically, (b) driving the empty wall retaining casing, in which the support plate and the hollow pile outer wall retaining pipe are installed, to drive the driving means into a predetermined depth from the surface of the soft ground; (C) driving the driving means to pull out the empty wall retaining casing from the soft ground; (d) forming a foundation pile by filling reinforced concrete or reinforced mortar with the inside of the pile outer wall retaining pipe; e) comprising a pile cap on the top of the foundation file.

In addition, after the step (f), (g) may further include the step of laying sand on the soft ground, and (h) installing a civil composite material, and after the step (h), (i) The method may further include installing the crushed stone, and (j) installing the civil composite material, wherein the civil composite material may be a geogrid.

The empty wall holding casing may be made of any one of iron, polyethylene ether (PPE), polyethylene (PE), the shape is based on a circular shape.

The pipe outer wall maintenance pipe may be made of any one material of iron, polyethylene ether, polyethylene, polyethylene terephthalate, the shape is based on a circle.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a perspective view showing a casing indentation apparatus for the basic pile construction of the soft ground according to the present invention, Figure 2 is a partial cutaway perspective view of the guide of the casing indentation apparatus according to the present invention.

As shown in these, the casing indentation apparatus for the basic pile construction of the soft ground according to the present invention is supported by the hydraulic excavator (1), the guide 10 installed on the hydraulic excavator (1), the guide 10 and the ground Hollow wall retaining casing 20 for excavating the inner hole, and guide 10 is installed in the guide wall and the driving means for driving the hollow wall holding casing 20 up and down the driving force of the hollow wall holding casing 20 It is composed largely as a power transmission means for transmitting.

The guide 10 is rotatably installed on the hydraulic excavator 1 so that it can be transported by the excavator 1 in a horizontally laid down state in normal times, and stands vertically during the press-fitting operation of the casing 20 in the soft ground. You lose.

First and second guide rollers 12 are provided at upper and lower portions of the guide 10, respectively, and the cable 16 is wound around the guide roller 12. Both ends of the cable 16 are connected to the buffer unit 30 to be described later to form a closed loop. A part of the cable 16 passes up and down the inside of the guide 10, and the other part is located outside the guide 10 together with the buffer part 30. At this time, the shock absorbing portion 30 is fixedly coupled to the upper outer surface of the empty wall holding casing 20, and when the cable 16 forming the closed loop is moved, the shock absorbing portion 30 and the empty wall retaining casing 20 are moved. Up and down linear movement will be made together.

The tension adjusting unit 40 is composed of a cylinder 42 and a piston 44 that enters and exits the cylinder 42 by the hydraulic pressure generated by the hydraulic system of the excavator 1. As shown in FIG. 2, the cylinder 42 is fixed to the guide 10, and the tip of the piston 44 is coupled to the bracket 15. In addition, a guide rail 11 for supporting the bracket 15 so as to be movable can be installed on the outer surface of the guide 10. Thereby, by adjusting the operating distance of the piston 44 by the hydraulic pressure generated by the hydraulic system of the excavator 1, the distance of the first guide roller 12 is adjusted, so that the tension of the cable 16 can be determined. do.

In addition, at least one hydraulic motor 50 driven by the hydraulic system of the excavator 1 is installed inside the guide 10, and the hydraulic motor 50 is provided at the driving shaft 52 of the hydraulic motor 50. The drums 53 and 54 which are rotated by the driving of 50 and are supported by the cable 16 wound on the surface thereof are provided. This will be described later in detail.

Figure 3 is a partial cutaway perspective view showing the internal configuration of the shock absorbing portion 30 of the casing press-fit device for the foundation pile construction of the soft ground according to the present invention.

As shown, the open upper and lower ends of the hollow cylindrical body 32 are closed by a disc shaped cover 33. And, a part is accommodated in the interior of the body 32, the other part is provided with a pair of upper and lower pins 34 through the upper and lower cover 33 respectively exposed to the outside of the body 32. A cable 16 is connected to the exposed end of each pin 34, and a disc shaped release prevention plate 35 is coupled to the end of each pin 34 located inside the body 32. In addition, a spring 36 is provided between the cover 33 and the release preventing plate 35, which spring 36 has a function of applying an acting force to the cable 16 in the inward direction of the body 32. At the same time, it functions to alleviate shock and vibration generated during the press-in step of the empty wall holding casing 20.

The cylindrical body 32 of the shock absorbing portion 30 containing the above components is fixed to the connecting plate 22 attached to the upper outer surface of the empty wall holding casing 20, thereby the shock absorbing portion 30 and Hollow wall retaining casing 20 is to move up and down straight together. Reference numeral 18 is a guide frame which is installed on the outer surface of the guide 10 so that the vertical movement of the empty wall holding casing 20 can be made in a straight line by guiding the movement of the connecting plate 22.

Figure 4 is a cross-sectional view showing a drive unit of the casing indentation apparatus for the basic pile construction of the soft ground according to the present invention.

As shown, a plurality of hydraulic motors 50 driven by the hydraulic system of the excavator 1 are arranged up and down inside the guide 10, the drive shaft 52 of the hydraulic motor 50 is It is perpendicular to the longitudinal axis of the guide 10.

The upper drum 53 and the lower drum 54 are coupled to the drive shaft 52 of each hydraulic motor 50. The cables 16 are wound several times on the surfaces of the drums 53 and 54, and the cable ( 16 are provided with grooves 53a and 54a so that they can be easily wound.

At this time, the cable 16 is wound around the upper and lower pairs of drums 53 and 54 in a shape of approximately " 8 ", so that the rotational movements of the drums 53 and 54 are converted to the vertical movement of the cable 16 up and down. do. In addition, the cable 16 may be provided in an oval shape around the drums 53 and 54.

The grooves 53a of the upper drum 53 and the grooves 54a of the lower drum 54 are arranged to intersect with each other, and portions of the cable 16 passing through the upper and lower drums 53 and 54 interfere with each other. This is to prevent friction caused by contact or contact.

By the above configuration, when the hydraulic motor 50 is driven, the drums 53 and 54 are in a rotational motion, which is converted into a linear motion of the cable 16 so that the vertical motion of the casing 20 for maintaining the empty wall is eventually increased. Will be done. At this time, the hydraulic motor 50 should be capable of generating a pressure input of approximately 300 kN or more.

On the other hand, as shown in Figure 5, the support plate 24 is coupled to the lower end of the empty wall holding casing 20. The support plate 24 has the same shape as the cross-sectional shape of the empty wall retaining casing 20 so that the lower open end of the empty wall retaining casing 20 can be closed, and the engaging pin 24a protrudes. These coupling pins 24a are brought into close contact with the inner surface of the empty wall retaining casing 20 when the support plate 24 is coupled to the lower end of the empty wall retaining casing 20, so that the supporting plate 24 is empty without any additional coupling means. It can be coupled to the holding casing 20, so that it can be easily separated later. The support plate 24 is to increase the tip bearing capacity of the pile that is built in the soft ground.

6 is a cross-sectional view showing a basic pile construction method using a casing press-fitting apparatus for the basic pile construction of the soft ground according to the present invention.

When the hydraulic motor 50 is driven by the hydraulic system of the excavator 1, the drums 53 and 54 coupled to the drive shaft 52 of the hydraulic motor 50 rotate, and the first guide roller 12 Supported by the to form a closed loop and wound around the drum (53, 54) provided cable 16 is to move. The empty wall retaining casing 20 provided on one side of the guide 10 is connected to the cable 16 through the connecting plate 22 and the buffer part 30, and thus maintains the empty wall together with the movement of the cable 16. The casing 20 is linearly moved downward along the side of the guide 10.

As a result, as shown in FIG. 6A, the hollow wall retaining casing 20 is indented while digging a hole to a predetermined depth from the surface of the soft ground G.

When the empty wall holding casing 20 is press-fitted by the predetermined predetermined depth, the driving of the hydraulic motor 50 is stopped.

As shown in (b) of FIG. 6, a pile outer wall holding pipe 60 is inserted into an inner empty space of the empty wall holding casing 20, and a lower end of the pipe 60 is supported by a support plate 24. Is supported in contact with the phase.

Preferably, the pipe outer wall holding pipe 60 is made of a hollow cylindrical shape having a diameter of approximately 150 ~ 200mm, relatively lightweight such as polyethylene (PE) or polyethylene terephthalate (PET) It is made of material.

Next, as shown in FIG. 6C, the foundation pile 70 is constructed by filling the reinforced concrete 25 or the reinforced mortar with the inside of the pile outer wall holding pipe 60. The pile 70 is characterized by excellent resistance to lateral pressure as compared to a sand compaction file or a crushed stone file.

As shown in FIG. 6 (d), the hydraulic motor 50 is driven to pull out the empty wall retaining casing 20 from the ground G by the power transmission mechanism described above. At this time, the support plate 24 is easily separated from the empty wall holding casing 20, and serves to strengthen the tip bearing force of the foundation pile 70.

Thereafter, as shown in FIG. 6E, the pile cap 72 is provided at the upper end of the foundation pile 70 to prevent impurities from entering the interior of the foundation pile 70.

Finally, as shown in Figure 6 (f), after laying the sand (74) on the surface of the soft ground (G) on which a plurality of foundation piles 70 are constructed, civil synthesis such as geogrid (Geogrid) Install the material 75, Geosynthetics. This is to improve the bearing capacity of the soft ground (G) by absorbing or reducing the lateral pressure applied to the soft ground (G) by the friction characteristics between the grid-like geosynthetic reinforcement and the soil. In addition, in order to further reinforce such bearing capacity improvement characteristics, after the geogrid 75 is installed, the crushed stone 78 may be laid, and a civil composite material 79 such as geogrid may be installed again.

The present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims.

As described in detail above, according to the casing press-fit device and the foundation pile construction method for the construction of the foundation pile of the soft ground according to the present invention, the hollow wall holding casing equipped with the pipe outer wall holding pipe and the support plate a predetermined depth in the soft ground As a process of constructing a foundation pile by filling a non-perforated steel, removing the casing to the outside of the ground, and filling reinforced concrete or reinforcing mortar, the noise and vibration are remarkably reduced as compared to the conventional perforation or driving method. Excellent economical efficiency due to shortening of the period, and the construction can be effected regardless of the narrow working space.

1 is a perspective view showing a casing indentation apparatus for the basic pile construction of the soft ground according to the present invention,

Figure 2 is a partial cutaway perspective view of the guide of the casing indentation apparatus for building the foundation pile according to the present invention,

Figure 3 is a partial cutaway perspective view of the shock absorbing portion of the casing press-fit device for building the foundation pile according to the present invention,

Figure 4 is a cross-sectional view showing a drive unit of the casing press-fit device for building the foundation pile according to the present invention;

5 is a perspective view showing a lower portion of the casing for maintaining the wall according to the invention,

Figure 6 is a cross-sectional view showing a basic pile construction method using a casing press-fit device for the basic pile construction of the soft ground according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Excavator 10: Guide

12: first guide roller 16: cable

20: Casing for retaining walls

24: support plate 30: buffer part

40: tension control unit 50: hydraulic motor

53, 54: Drum 60: Pipe for maintaining the outer wall of the pile

70: file 72: pile cap

75,79: Geogrid

Claims (14)

In the device for building the foundation file in the soft ground, Excavators; A guide installed in the excavator; A hollow hollow wall retaining casing installed in the guide so as to be movable up and down linearly and having a support plate detachably coupled to a lower end thereof to strengthen the tip support force of the pile; Drive means installed in the guide for generating a driving force to press the empty wall holding casing into the soft ground; And Casing press-fitting device for the basic pile construction of the soft ground, characterized in that for connecting the drive means and the empty wall holding casing and a power transmission means for transmitting the driving force of the driving means to the empty wall holding casing. 2. The casing press-fitting device according to claim 1, wherein the driving means is at least one hydraulic motor. 3. The apparatus of claim 2, wherein the power transmission means comprises at least one drum coupled to each drive shaft of the hydraulic motor, a cable wound around the drum to form a closed loop, and a part of the cable wall retaining casing coupled thereto; And a second guide roller fixed to an upper side of the guide so as to support a cable, and a second guide roller installed to be movable in a lower side of the guide. 4. The casing press-fitting device according to claim 3, wherein the surface of the drum is provided with a groove for accommodating the cable. 4. The foundation of the soft ground according to claim 3, wherein a middle of the cable is provided with a shock absorbing portion coupled with the empty wall retaining casing to mitigate the shock and vibration generated during the press fitting process of the empty wall retaining casing. Casing indentation device for pile construction. The method of claim 5, wherein the buffer portion is a hollow body, a cover for closing the open upper and lower ends of the body, and through the cover is partially received in the interior of the body and the other part is exposed to the outside of the body And a pin connected to the cable, a release preventing plate coupled to an end of the pin located inside the body, and a spring provided between the cover and the release preventing plate. Casing press-fitting device for basic pile construction. 4. The casing press-fitting device according to claim 3, wherein the guide is provided with a tension adjusting part for adjusting the tension of the cable by changing the position of the guide roller. The method of claim 7, wherein the tension adjusting portion comprises a cylinder fixed to one side of the guide, the piston is provided to be able to enter and exit by the hydraulic pressure inside and outside of the cylinder and the front end is coupled to the second guide roller Casing press-fitting device for building the foundation pile of soft ground. In the basic pile construction method of the soft ground using the apparatus of claim 1, (a) vertically positioning the hollow wall retaining casing on which the guide and the pile outer wall retaining pipe and the support plate are mounted on the soft ground to be constructed; (b) press-fitting the hollow wall retaining casing, having the pile outer wall retaining pipe and the support plate, driven by the driving means to a predetermined depth from the surface of the soft ground; (c) driving the driving means to pull out the empty wall holding casing from the soft ground; (d) forming a foundation pile by filling reinforced concrete or reinforced mortar with the inside of the pipe outer wall maintenance pipe; And (e) Basic pile construction method comprising the step of providing a pile cap on the top of the basic pile. The method of claim 9, wherein after step (e), (f) laying sand on the soft ground; (g) The basic pile construction method further comprising the step of installing a civil composite material. The method of claim 10, wherein after step (g), (h) laying the stone, (i) a foundation pile construction method, further comprising the step of installing a civil composite material. 12. The method according to claim 10 or 11, wherein the civil composite material is a geogrid. 10. The method according to claim 9, wherein the pipe outer wall retaining pipe is made of polyethylene. 10. The method according to claim 9, wherein the pipe outer wall holding pipe is made of polyethylene terephthalate material.